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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
| val | rn |
|---|---|
| 20 | 1 |
| 50 | 3 |
| 50 | 3 |
| 60 | 4 |
| 70 | 5 |
| val | rn |
|---|---|
| 20 | 1 |
| 50 | 3 |
| 50 | 3 |
| 60 | 4 |
| 70 | 5 |